diff options
| author | Benoit Cousson <b-cousson@ti.com> | 2010-05-20 12:31:08 -0600 |
|---|---|---|
| committer | Paul Walmsley <paul@pwsan.com> | 2010-05-20 12:31:08 -0600 |
| commit | 9a23dfe12806920a8dfadec5ea5b83e5ca5378c9 (patch) | |
| tree | 491129978e63b080cbc7f6656387f03bd2564d49 /arch/arm/mach-omap2/omap_hwmod.c | |
| parent | d9e6625c70ff007ae246c9d62f8cdec8d08b2457 (diff) | |
OMAP4: hwmod & CM: Implement the omap4_cm_wait_module_ready function
The return of the omap4_cm_wait_module_ready function is checked
in order to avoid accessing the sysconfig register if the module is
not in the correct state.
In that case the _setup will exit without trying to reset
using sysconfig.
For the moment a warning is printed. A proper management of fclk
and module reset will have to be done in order to init correctly
the problematic IPs listed below.
<4>omap_hwmod: ivahd: cannot be enabled (3)
<4>omap_hwmod: iss: cannot be enabled (3)
<4>omap_hwmod: tesla: cannot be enabled (3)
<4>omap_hwmod: sdma: cannot be enabled (3)
<4>omap_hwmod: sl2: cannot be enabled (3)
<4>omap_hwmod: sad2d: cannot be enabled (3)
<4>omap_hwmod: ducati: cannot be enabled (3)
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Diffstat (limited to 'arch/arm/mach-omap2/omap_hwmod.c')
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 33 |
1 files changed, 20 insertions, 13 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index e436dcb19795..4a134c4d2271 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -819,11 +819,8 @@ static int _wait_target_ready(struct omap_hwmod *oh) ret = omap2_cm_wait_module_ready(oh->prcm.omap2.module_offs, oh->prcm.omap2.idlest_reg_id, oh->prcm.omap2.idlest_idle_bit); -#if 0 } else if (cpu_is_omap44xx()) { - ret = omap4_cm_wait_module_ready(oh->prcm.omap4.module_offs, - oh->prcm.omap4.device_offs); -#endif + ret = omap4_cm_wait_module_ready(oh->prcm.omap4.clkctrl_reg); } else { BUG(); }; @@ -912,16 +909,21 @@ static int _enable(struct omap_hwmod *oh) _add_initiator_dep(oh, mpu_oh); _enable_clocks(oh); - if (oh->class->sysc) { - if (!(oh->_int_flags & _HWMOD_SYSCONFIG_LOADED)) - _update_sysc_cache(oh); - _sysc_enable(oh); - } - r = _wait_target_ready(oh); - if (!r) + if (!r) { oh->_state = _HWMOD_STATE_ENABLED; + /* Access the sysconfig only if the target is ready */ + if (oh->class->sysc) { + if (!(oh->_int_flags & _HWMOD_SYSCONFIG_LOADED)) + _update_sysc_cache(oh); + _sysc_enable(oh); + } + } else { + pr_debug("omap_hwmod: %s: _wait_target_ready: %d\n", + oh->name, r); + } + return r; } @@ -999,7 +1001,7 @@ static int _shutdown(struct omap_hwmod *oh) static int _setup(struct omap_hwmod *oh) { struct omap_hwmod_ocp_if *os; - int i; + int i, r; if (!oh) return -EINVAL; @@ -1023,7 +1025,12 @@ static int _setup(struct omap_hwmod *oh) oh->_state = _HWMOD_STATE_INITIALIZED; - _enable(oh); + r = _enable(oh); + if (r) { + pr_warning("omap_hwmod: %s: cannot be enabled (%d)\n", + oh->name, oh->_state); + return 0; + } if (!(oh->flags & HWMOD_INIT_NO_RESET)) { /* |